:root {
  --bg: #f3f7f3;
  --text: #333333;
  --accent: #2f855a;
  --card: #FFFFFF;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Hiragino Kaku Gothic ProN", "Yu Gothic", "Meiryo", sans-serif;
  line-height: 1.8;
  color: var(--text);
  background-color: var(--bg);
  background-image: radial-gradient(#dbe7db 1px, transparent 1px);
  background-size: 18px 18px;
}

.container {
  width: min(960px, 92%);
  margin: 40px auto 60px;
  display: grid;
  gap: 22px;
}

.site-header {
  width: min(960px, 92%);
  margin: 20px auto 0;
}

.logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  letter-spacing: 0.06em;
  font-size: 1rem;
  color: var(--accent);
}

.logo-icon {
  width: 14px;
  height: 14px;
  background: linear-gradient(135deg, #68d391, #2f855a);
  border-radius: 50% 50% 50% 0;
  transform: rotate(-45deg);
  position: relative;
  flex-shrink: 0;
}

.logo-icon::after {
  content: "";
  position: absolute;
  bottom: -4px;
  left: 50%;
  width: 6px;
  height: 4px;
  background: #2f855a;
  transform: translateX(-50%);
  border-radius: 2px;
}

.card {
  background-color: var(--card);
  border: 1px solid #e5efe5;
  border-radius: 16px;
  padding: 36px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.06);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 16px 32px rgba(0, 0, 0, 0.08);
}

h1,
h2 {
  margin: 0 0 14px;
  line-height: 1.45;
  color: var(--accent);
}

h1 {
  font-size: clamp(1.4rem, 2.4vw, 2rem);
}

h2 {
  font-size: clamp(1.15rem, 2vw, 1.45rem);
  position: relative;
  padding-left: 12px;
}

h2::before {
  content: "";
  position: absolute;
  left: 0;
  top: 4px;
  width: 4px;
  height: 70%;
  background: linear-gradient(to bottom, #2f855a, #68d391);
  border-radius: 2px;
}

h3 {
  margin: 0 0 8px;
  color: var(--accent);
  font-size: 1.05rem;
  line-height: 1.4;
}

p {
  margin: 0;
  font-size: 0.95rem;
}

p + p {
  margin-top: 12px;
}

.hero {
  padding: 56px 40px;
  background: linear-gradient(135deg, #e6f4ea 0%, #ffffff 70%);
  position: relative;
  overflow: hidden;
}

.hero::after {
  content: "";
  position: absolute;
  right: -60px;
  top: -60px;
  width: 200px;
  height: 200px;
  background: rgba(47, 133, 90, 0.18);
  border-radius: 50%;
}

.hero > * {
  position: relative;
  z-index: 1;
}

.hero h1 {
  font-size: clamp(1.8rem, 3vw, 2.4rem);
}

.hero p {
  font-size: 1.05rem;
}

.card.highlight {
  border-left: 4px solid var(--accent);
}

.grid {
  display: grid;
  gap: 16px;
}

.feature {
  padding: 16px;
  border-radius: 12px;
  background: #edf7ed;
  border: 1px solid #d8e8d8;
}

.contact {
  text-align: center;
}

.contact-button {
  display: inline-block;
  margin-top: 14px;
  background-color: var(--accent);
  color: #FFFFFF;
  text-decoration: none;
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: 0.03em;
  border-radius: 999px;
  padding: 12px 24px;
  transition: transform 0.2s ease, box-shadow 0.2s ease, opacity 0.2s ease;
  box-shadow: 0 6px 14px rgba(47, 133, 90, 0.28);
}

.contact-button:hover,
.contact-button:focus-visible {
  transform: translateY(-1px);
  opacity: 0.95;
  box-shadow: 0 8px 18px rgba(47, 133, 90, 0.35);
}

.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.fade-in.show {
  opacity: 1;
  transform: translateY(0);
}

.site-header.fade-in { transition-delay: 0.05s; }
.container > .fade-in:nth-child(1) { transition-delay: 0.1s; }
.container > .fade-in:nth-child(2) { transition-delay: 0.2s; }
.container > .fade-in:nth-child(3) { transition-delay: 0.3s; }
.container > .fade-in:nth-child(4) { transition-delay: 0.4s; }
.container > .fade-in:nth-child(5) { transition-delay: 0.5s; }
.container > .fade-in:nth-child(6) { transition-delay: 0.6s; }
.container > .fade-in:nth-child(7) { transition-delay: 0.7s; }
.container > .fade-in:nth-child(8) { transition-delay: 0.8s; }

@media (max-width: 640px) {
  .container {
    width: 94%;
    margin: 18px auto 34px;
    gap: 14px;
  }

  .site-header {
    width: 94%;
    margin: 14px auto 0;
  }

  .card {
    padding: 20px 16px;
    border-radius: 12px;
  }

  .hero {
    padding: 30px 18px;
  }

  .card:hover {
    transform: none;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.06);
  }

  h1,
  h2 {
    margin-bottom: 10px;
  }
}